Annular kiln for drying as well as for carbonizing solid carbonaceous or the like materials



Oct. 6, 1925. 1,556,571

o. DoBBELsTl-:IN Er AL ANNULAR XILN FOR DRYING AS WELL AS FDR CARBONIZING SOLID CARBONACEOUS OR THE LIKE MATERIALS und. aan. 24, 192s Patented oa. e, v1925..

UNITED STATES PATENT OFFICE.

OTTO DOBBEISTEIN, 0F ESSEN, AND HERMANN HESS, OF DUISBURG, GERMANY.

.ANNULAB KILN FUR DRYING AS WELL AS FOR CARBONIZING SOLID CARBONACEOUS OR THE LIKE MATERIALS.

Application filed January To all whom, it may concern.'

and HERMANN HEss, German citizens, and residing at Essen and Duisburg, respectively, both in Germany, have invented certain new and useful Improvements in an Annular Kiln for Drying as Well as for Carbonizing Solid Carbonaceous or the like Materials (for which we vhave led an application for patent in Germany on 2nd February, 1924:, No. D. 44,871 VI/lO), of which the Jfollowing is a specification.

This invention relates to an improved annular kiln with bottom heating and gas collector, for drying -as well as for carbonizing solid carbonaceous orthe like materials of any kind such as coal, ores, bituminous slate, `and the like.

The accompanying drawing represents the improved annular kiln: Figs. 1 and 2 are perpendicular sections, respectively on the lines 1-1 and 27-2 of Fig. 3 which-shows the kiln 'in a plan view.

The annular kiln comprises a series of concentric ring pockets a and of ring spaces b with open lower ends between the single ring' pockets, for heating the latter. Said ring Vpocket s stem rotates above an annular heating c annel o. Above the rotary ring pocket system a stationary annular collector d is located for collecting the vapors produced, for instance when carbonizing coal, and leading the same 0H through vapor oftake pipes d.

For separately gaining the dierently composed gases escaping from the single zones during the carbonizing process, radial partition-walls (such as indicated at e, Fig. 3) extending down to the top of the rotary ruig pocket system, may be provided in said collector d.

Heating may be e'ected by means of waste-gases or by gas-burners. The bottom of the heating channel c ascends from the outer circumferencetoward the middle of the annular kiln up to the bottom of the ring pocket lsystem (Fig. 1), so that the heating gases are compelled to travel through the spaces b between the single ring pockets a. Between the admission c and the outlet c of the heating gases aspartitionwall f (Fig. 3) is rovided in the heating channel c, which wa l is comb-shaped in such 24, 1925. Serial No. 4,512.

a way that its teeth at this place lill out the spaces b between the single ring pockets a.

For carbonizing coal, the latter is automatically supplied into the ring pockets 'a through a' hopper w extending from above through the bonnet d down to the top of the ring pocket system and is then slowly rotated with the latter in the direction of arrow e (Fig. 3). The heating gases travel in opposite direction. The admission of the heating gases into the heating channel c takes place underneath the place, Where the materlals after their nished treatment are excavated, so that there the meanwhile produced coke receives its strongest heating and thereby a great firmness. The excavation of the coke takes place automatically by the latter, owing to the rotation of the ring pocket system,travelling up, in the direction of arrow o, the upwardly inclined plane of a comb-shaped stationary excavator g (Fig. 2) extending into each ring pocket down to the bottom of the same. The ring of the gas collector d is interrupted above said excavator g so that thecoke after its ascent from the ring pockets a can be excavated in lat eral direction by means of a conveyor lz. (Figi 2) radially arranged above the ring pocket system.

The excavation of the materials from the l In some cases, particularly for drying' non-baking materials, it may be desirable to so construct the annular kiln that the excavation does not take place to up above but to'down below. In this case, the ring y pockets a for the reception of the goods must be open at the lower ends; their closure isl then effected by means of a stationary bottom plate provided with annular slots for a paslage therethrough of the heating Agases to t e spaces and completely interles rupted below the excavator, so that the uplarge heatin tion vannular kiln are accessible ltion where the same are led off by a conveyor.

The improved annular kiln ensures by its surface a high capacity. The materials to e dried or to be carbonlzed are kept at perfect rest during their slow rota- -so that a formation of dust is pery prevented. The single parts of the rom all sides.

feet

What we claim, is

1. An annular kiln for drying as well as for carbonizing solid carbonaceous or the like materials, comprising, in combination: a rotary series of concentric ring pockets having ring spaces with open lower ends between the single ring pockets, astationary annular heating channel below said ring pocket system, a stationar annular' gas collector above said ring poc et system having vapor oftakepipes, a stationary feedin hopper extending from above through sai collector down to the top of the ring'- pocket s stem, and stationary means for excavating the materials from said pockets after their finished treatment; said heating channel having an admission opening located underneath the excavation place of the materials and an outlet opening located underneath said feeding hopper.

2. An annular kiln as specified in claim 1: in which the bottom of said annular heating channel ascends from the outer circumlftfiaence toward the middle of the annular 3. In an annular kiln as specified in claim 1: a comb-shaped partition-wall between the admission and the outlet opening of said annular heating channel, the comb teeth of said wall extending into and filling out the spaces between the single ring pockets at this place.

4. In an annular kiln as specified in claim 1: radial partition-walls in said gas collector extending down to the top of the rotary ring pocket system.

5.An annular kiln as specified in claimv 1: in which said excavating means consists of a comb-shaped inclined plane extending from the bottom of each single ringl pocket up to the top ofthe same, and of a conveyor located above said excavator; the ring of the gas collector'being interrupted vbetween said excavatorand conveyor.

In testimony whereof we have hereunto set our hands.

OTTO DOBBELSTEIN. HERMANN HESS. 

